The OPTIONS button is on the Home menu toolbar... or click the Menu icon (top-left), then TOOLS | OPTIONS.
You have noted A/R options via a right-click on a clip in the bin. That's about it, but for preview window settings... MATCH CONTENT, MATCH MONITOR and other choices that will drop down when clicking the chevron at the right of the Aspect Ratio box...
There's no frame-rate adjustment, until export.